Fix many typos in docs and comments

This commit corrects many typos found in scaladocs, comments and
documentation. It should reduce a bit number of PRs which fix one
typo.

There are no changes in the 'real' code except one corrected name of
a JUnit test method and some error messages in exceptions. In the case
of typos in other method or field names etc., I just skipped them.

Obviously this commit doesn't fix all existing typos. I just generated
in IntelliJ the list of potential typos and looked through it quickly.

1 files changed, 1 insertions, 1 deletions

diff --git a/test/junit/scala/tools/nsc/symtab/StdNamesTest.scala b/test/junit/scala/tools/nsc/symtab/StdNamesTest.scala
index 524d2e45e0..91f94e09b6 100644
--- a/test/junit/scala/tools/nsc/symtab/StdNamesTest.scala
+++ b/test/junit/scala/tools/nsc/symtab/StdNamesTest.scala
@@ -19,7 +19,7 @@ class StdNamesTest {
   }
 
   @Test
-  def testNewTermNameNegativeLenght(): Unit = {
+  def testNewTermNameNegativeLength(): Unit = {
     assertEquals(nme.EMPTY, newTermName("foo".toCharArray, 0, -1))
     assertEquals(nme.EMPTY, newTermName("foo".toCharArray, 0, 0))
   }